Affinage

DNAH1

Dynein axonemal heavy chain 1 · UniProt Q9P2D7

Length
4265 aa
Mass
487.5 kDa
Annotated
2026-06-09
24 papers in source corpus 10 papers cited in narrative 10 extracted findings
Cross-family judge vs UniProt: Affinage preferred faithfulness: 5/5 claims corpus-supported (100%)

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

DNAH1 encodes an inner dynein arm (IDA) heavy chain required for the structural and functional integrity of sperm flagellar axonemes (PMID:24360805). Loss of DNAH1 causes selective absence of inner dynein arms (with outer arms preserved), loss of radial spokes, disruption of the central pair apparatus, and mislocalization of microtubule doublets and outer dense fibers, producing multiple morphological abnormalities of the sperm flagella (MMAF) and male infertility (PMID:24360805, PMID:37302001). DNAH1 is incorporated into the IDA through physical association with partner proteins: it co-assembles with ZMYND12 and TTC29 in an axonemal complex (PMID:37934199) and is recruited to inner dynein arm positions by DNAH12, whose deficiency prevents flagellar loading of both DNAH1 and DNALI1 [PMID:bio_10.1101_2024.06.20.599934]. Its broader axonemal localization, in respiratory cilia as well, depends on the CCDC39/CCDC40 molecular ruler complex that establishes the 96 nm repeat (PMID:39056782). A mouse model demonstrates that DNAH1 is needed for normal flagellar beat and for sperm penetration of the zona pellucida, since mutant sperm fertilize only zona-free oocytes (PMID:30734403).

Mechanistic history

Synthesis pass · year-by-year structured walk · 6 steps
  1. 2013 High

    Established that DNAH1 is an inner dynein arm heavy chain whose loss causes axonemal disorganization and MMAF, defining the gene's basic role in flagellar architecture and male fertility.

    Evidence RT-PCR, immunostaining, and TEM on patient sperm with homozygosity mapping

    PMID:24360805

    Open questions at the time
    • Did not resolve which direct partners recruit DNAH1 to the axoneme
    • Mechanism linking IDA loss to doublet mislocalization unspecified
  2. 2016 Medium

    Confirmed that distinct loss-of-function alleles abolish DNAH1 protein in sperm and underlie the MMAF ultrastructural phenotype, solidifying pathogenicity across independent patients.

    Evidence RT-PCR, Western blot, immunofluorescence, and electron microscopy on patient sperm carrying splice-site and frameshift mutations

    PMID:27573432 PMID:27798045

    Open questions at the time
    • Single-lab cohorts
    • No functional reconstitution of the missing protein
  3. 2019 High

    Showed in a genetic mouse model that DNAH1 is required for normal flagellar motility and zona pellucida penetration, providing in vivo functional confirmation beyond patient correlations.

    Evidence ENU mutagenesis Dnah1 (ferf1) mouse, sperm motility analysis, and IVF with zona-intact versus zona-free oocytes

    PMID:30734403

    Open questions at the time
    • Missense allele may retain partial function
    • Does not address respiratory ciliary role
  4. 2021 Medium

    Linked DNAH1 loss to reduced DNALI1 expression and identified a partial-isoform mechanism explaining mouse-human phenotypic discordance, refining how DNAH1 isoforms support axonemal assembly.

    Evidence TEM and qPCR on patient sperm; Dnah1Δiso1 knockout mouse with TEM and SPAG6 immunostaining

    PMID:33989052 PMID:34867808

    Open questions at the time
    • Functional interdependence with DNALI1 inferred from mRNA, not protein interaction
    • Isoform 2 contribution not directly demonstrated in human
  5. 2023 High

    Defined DNAH1 as part of a conserved ZMYND12-TTC29 axonemal complex and confirmed selective IDA (not ODA) loss, advancing from phenotype to molecular complex membership.

    Evidence Co-IP, comparative proteomics in Trypanosoma and Ttc29 KO mice, IF in human sperm, expansion microscopy in T. brucei; IDA/ODA marker immunostaining and TEM

    PMID:37302001 PMID:37934199

    Open questions at the time
    • Stoichiometry and direct binding interfaces within the complex unresolved
    • Order of assembly relative to DNAH1 loading unknown
  6. 2024 Medium

    Identified DNAH12 as the direct partner recruiting DNAH1 to inner dynein arms and established that CCDC39/CCDC40 ruler integrity is required for DNAH1 axonemal localization, mapping the recruitment hierarchy.

    Evidence Co-IP and Dnah12 KO/mutant mice with TEM and IF (preprint); immunofluorescence of respiratory cilia in 51 individuals with CCDC39/CCDC40 variants

    PMID:39056782 PMID:bio_10.1101_2024.06.20.599934

    Open questions at the time
    • DNAH12 interaction from preprint, not peer-reviewed
    • Whether CCDC39/CCDC40 act directly on DNAH1 or via the ruler scaffold not distinguished

Open questions

Synthesis pass · forward-looking unresolved questions
  • The motor mechanochemistry of DNAH1 and the structural basis of its assembly into the IDA with DNAH12, ZMYND12, and TTC29 remain uncharacterized.
  • No structural model of DNAH1 within the inner dynein arm
  • ATPase/motor activity not directly assayed
  • Direct binding interfaces among complex members undefined

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0003774 cytoskeletal motor activity 2 GO:0008092 cytoskeletal protein binding 2
Localization
GO:0005856 cytoskeleton 2 GO:0005929 cilium 1
Pathway
R-HSA-1474165 Reproduction 2 R-HSA-1852241 Organelle biogenesis and maintenance 2
Partners
DNAH12DNALI1TTC29ZMYND12
Complex memberships
ZMYND12-TTC29-DNAH1 axonemal complexinner dynein arm

Evidence

Reading pass · 10 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2013 DNAH1 encodes an inner dynein arm heavy chain; loss-of-function mutations cause axonemal disorganization including mislocalization of microtubule doublets and loss of inner dynein arms in sperm flagella, leading to MMAF and male infertility. Neither transcript nor protein was detected in affected individuals with a splice-site mutation, confirming pathogenicity. RT-PCR, immunostaining, transmission electron microscopy on patient sperm; homozygosity mapping American journal of human genetics High 24360805
2016 DNAH1 splice-site mutation (c.8626-1G>A) results in complete absence of both DNAH1 RNA and protein in sperm, confirming that loss of DNAH1 protein underlies the MMAF phenotype. RT-PCR and immunochemistry on sperm samples from affected individuals Human reproduction (Oxford, England) Medium 27798045
2016 A homozygous frameshift mutation in DNAH1 (c.11726_11727delCT) leads to absence of DNAH1 protein in spermatozoa (despite mRNA expression), and causes flagellar ultrastructural defects detectable by scanning and transmission electron microscopy. Western blot, immunofluorescence staining, scanning and transmission electron microscopy on patient sperm Clinical genetics Medium 27573432
2019 A missense mutation in Dnah1 (ferf1 allele) in mice causes abnormal sperm clumping, aberrant sperm motility, and failure to penetrate the zona pellucida, but ferf1 sperm can fertilize zona-free oocytes, indicating DNAH1 is required for normal flagellar function and zona penetration. ENU mutagenesis mouse model, in vitro fertilization assay with zona-intact and zona-free oocytes, sperm motility analysis Molecular reproduction and development High 30734403
2021 DNAH1 mutations cause loss of inner dynein arm and radial spoke from the axoneme, displacement of dense fibers and microtubule doublets, and are associated with dramatically reduced DNALI1 mRNA expression in patient sperm, suggesting a functional interdependence between DNAH1 and DNALI1. Transmission electron microscopy, quantitative PCR of DNALI1 mRNA in patient sperm DNA and cell biology Medium 33989052
2021 In Dnah1Δiso1/Δiso1 mice lacking the full-length isoform, a second DNAH1 isoform (isoform 2) is present and may mediate formation of normal ultrastructure in the absence of full-length protein, providing a mechanistic explanation for the phenotypic discordance between mouse and human DNAH1 mutants. Dnah1 knockout mouse model generation, transmission electron microscopy, SPAG6 immunostaining Frontiers in endocrinology Medium 34867808
2023 DNAH1 loss-of-function results in absence of inner dynein arms but not outer dynein arms in the sperm axoneme, leading to general ultrastructural disorganization including loss of the central pair and mislocalization of microtubule doublets and outer dense fibers. Immunostaining (inner vs outer dynein arm markers), transmission electron microscopy on patient sperm Andrology Medium 37302001
2023 DNAH1 is part of an axonemal complex together with ZMYND12 and TTC29; loss of ZMYND12 causes altered localization of DNAH1 (and DNALI1, WDR66, TTC29) in human sperm, and comparative proteomics in Trypanosoma and Ttc29 KO mice identified DNAH1 as a third member of the ZMYND12-TTC29 complex. Co-immunoprecipitation, comparative proteomics (Trypanosoma and Ttc29 KO mice), immunofluorescence in human sperm, ultrastructure expansion microscopy in T. brucei eLife High 37934199
2024 DNAH12 physically interacts with DNAH1 (and DNALI1), and DNAH12 deficiency causes failure to recruit DNAH1 and DNALI1 to inner dynein arms in sperm flagella, impairing sperm development without affecting ciliary function. Co-immunoprecipitation, Dnah12 knockout/mutant mouse models, transmission electron microscopy, immunofluorescence bioRxivpreprint Medium bio_10.1101_2024.06.20.599934
2024 Disease-causing variants in CCDC39 and CCDC40 (which form a molecular ruler complex maintaining 96 nm axonemal repeat units) cause absence of DNAH1 (along with DNAH6 and DNAH7) from respiratory ciliary axonemes, demonstrating that DNAH1 localization to cilia depends on the CCDC39/CCDC40 ruler complex. Immunofluorescence analysis of respiratory cilia in a cohort of 51 individuals with CCDC39/CCDC40 variants Cells Medium 39056782

Source papers

Stage 0 corpus · 24 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
2013 Mutations in DNAH1, which encodes an inner arm heavy chain dynein, lead to male infertility from multiple morphological abnormalities of the sperm flagella. American journal of human genetics 343 24360805
2016 Whole-exome sequencing of familial cases of multiple morphological abnormalities of the sperm flagella (MMAF) reveals new DNAH1 mutations. Human reproduction (Oxford, England) 95 27798045
2016 Homozygous DNAH1 frameshift mutation causes multiple morphological anomalies of the sperm flagella in Chinese. Clinical genetics 74 27573432
2017 DNAH1 gene mutations and their potential association with dysplasia of the sperm fibrous sheath and infertility in the Han Chinese population. Fertility and sterility 72 28577616
2015 Variation in DNAH1 may contribute to primary ciliary dyskinesia. BMC medical genetics 57 25927852
2022 Novel DNAH1 Mutation Loci Lead to Multiple Morphological Abnormalities of the Sperm Flagella and Literature Review. The world journal of men's health 34 35118838
2021 Mutational landscape of DNAH1 in Chinese patients with multiple morphological abnormalities of the sperm flagella: cohort study and literature review. Journal of assisted reproduction and genetics 16 33929677
2021 Novel Loss-of-Function Mutations in DNAH1 Displayed Different Phenotypic Spectrum in Humans and Mice. Frontiers in endocrinology 16 34867808
2018 Associations between DNAH1 gene polymorphisms and male infertility: A retrospective study. Medicine 16 30544445
2023 Novel biallelic variants in DNAH1 cause multiple morphological abnormalities of sperm flagella with favorable outcomes of fertility after ICSI in Han Chinese males. Andrology 15 37302001
2023 Novel axonemal protein ZMYND12 interacts with TTC29 and DNAH1, and is required for male fertility and flagellum function. eLife 14 37934199
2022 Genetic Variations and mRNA Expression of Goat DNAH1 and Their Associations with Litter Size. Cells 14 35456050
2023 Novel compound heterozygous mutations in DNAH1 cause primary infertility in Han Chinese males with multiple morphological abnormalities of the sperm flagella. Asian journal of andrology 12 36510862
2021 Novel Biallelic DNAH1 Variations Cause Multiple Morphological Abnormalities of the Sperm Flagella. DNA and cell biology 11 33989052
2021 Novel bi-allelic mutations in DNAH1 cause multiple morphological abnormalities of the sperm flagella resulting in male infertility. Translational andrology and urology 10 33968654
2024 Primary Ciliary Dyskinesia Associated Disease-Causing Variants in CCDC39 and CCDC40 Cause Axonemal Absence of Inner Dynein Arm Heavy Chains DNAH1, DNAH6, and DNAH7. Cells 9 39056782
2019 ENU-induced mutant allele of Dnah1, ferf1, causes abnormal sperm behavior and fertilization failure in mice. Molecular reproduction and development 9 30734403
2015 A perilipin gene from Clonostachys rosea f. Catenulata HL-1-1 is related to sclerotial parasitism. International journal of molecular sciences 7 25761240
2023 Identification of novel compound heterozygous variants in the DNAH1 gene of a Chinese family with left-right asymmetry disorder. Frontiers in molecular biosciences 3 37457836
2021 Successful Live Birth Following Natural Cycle Oocyte Retrieval in a Woman with Primary Infertility and Atypical Primary Ovarian Insufficiency with a DNAH1 Gene Deletion Mutation. Genetic testing and molecular biomarkers 2 34672773
2026 Novel DNAH1 variants in Chinese males with MMAF-associated asthenoteratozoospermia. Systems biology in reproductive medicine 0 41615819
2024 Expanding the Genetic Etiology of Multiple Morphological Abnormalities of the Sperm Flagella: A Case Report of Two Novel DNAH1 Variants. South Dakota medicine : the journal of the South Dakota State Medical Association 0 39841794
2024 Glomerulocystic Kidney Disease in an Adult with DNAH1 Mutation: A Case Report. Indian journal of nephrology 0 40896606
2021 [Analysis of DNAH1 gene variant in two infertile males with multiple morphological abnormalities of sperm flagella]. Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics 0 34487528

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